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usb: gadget: composite: Add usb_remove_config

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Add usb_remove_config to unbind a configuration and remove it from
the configs list. This allows implementing composite gadget drivers that
can disconnect themself from the bus and that will later be re-enumerated
with a different configuration.

Gadget drivers must call usb_gadget_disconnect before calling this
function to disable the pullup, disconnect the device from the host,
and prevent the host from enumerating the device while we are changing
the gadget configuration.

Signed-off-by: Benoit Goby <benoit@android.com>
This commit is contained in:
Benoit Goby
2011-12-13 16:16:31 -08:00
committed by Colin Cross
parent ea93b9c660
commit 894eecb7c7
2 changed files with 52 additions and 20 deletions
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3
include/linux/usb/composite.h
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@@ -242,6 +242,9 @@ int usb_add_config(struct usb_composite_dev *,
struct usb_configuration *,
int (*)(struct usb_configuration *));
int usb_remove_config(struct usb_composite_dev *,
struct usb_configuration *);
/**
* struct usb_composite_driver - groups configurations into a gadget
* @name: For diagnostics, identifies the driver.